.o-bottom-l{
	display:block;
	position:fixed;
	bottom:0;
	width: 750rpx;
	height: 1000rpx;
	background: #F7F9FC;
	overflow: scroll;
	z-index: 10;
}
.o-bg-a{
	width: 750rpx;
	height: 2000rpx;
	background-color: rgba(0,0,0,0.4);
	position: absolute;
	top: 0;
}